As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER PLACING THE GEAR HANDLE IN THE UP POSITION, THE GEAR UNSAFE LIGHT REMAINED ILLUMINATED AND THE DOOR NOT LATCHED LIGHT REMAINED ON. RECYCLED GEAR, WITH NO CHANGE. PERFORMED ALTERNATE UPLATCH CHECK AND GEAR WAS UP AND LOCKED. REPLACED MLG ACTUATOR AND CONTROL VALVE. PERFORMED OPERATIONAL CHECK IAW DC8 MM 32-60-0.